		var m = [20, 120, 20, 120],
		    w = 1280 - m[1] - m[3],
		    h = 800 - m[0] - m[2],
		    i = 0,
		    root;
		
		var tree = d3.layout.tree()
		    .size([h, w]);
		
		var diagonal = d3.svg.diagonal()
		    .projection(function(d) { return [d.y, d.x]; });
		
		var vis = d3.select("#tree").append("svg:svg")
		    .attr("width", w + m[1] + m[3])
		    .attr("height", h + m[0] + m[2])
		  .append("svg:g")
		    .attr("transform", "translate(" + m[3] + "," + m[0] + ")");
		
		d3.json("json.php", function(json) {
		  root = json;
		  root.x0 = h / 2;
		  root.y0 = 0;
		
		  function toggleAll(d) {
		    if (d.children) {
		      d.children.forEach(toggleAll);
		      toggle(d);
		    }
		  }
		
		  // Initialize the display to show a few s.
		  root.children.forEach(toggleAll);
		//   toggle(root.children[1]);
		//   toggle(root.children[1].children[2]);
		//   toggle(root.children[9]);
		//   toggle(root.children[9].children[0]);
		
		  update(root);
		});
		
		function update(source) {
			/* ---------------------------------- */
			$("#node-name").text(source.name);
			var request = {nodeId : source.id};
			$.ajax({
				type: "GET",
                url: "getNodeInfo.php",
                data : request
            }).done(function(response) {
            	console.log(response);
            	$("#table-body").empty();
            	for(var keyVal in response){
            	    var tr = $("<tr>").appendTo("#table-body");
                    var td1 = $("<td>").appendTo(tr);
                    var td2 = $("<td>").appendTo(tr);
                    console.log(keyVal);
                    console.log(response[keyVal]);
                    response[keyVal]
                    td1.text(keyVal);
                    td2.text(response[keyVal]);
            	}
            });			
			/* ---------------------------------- */

		  var duration = d3.event && d3.event.altKey ? 5000 : 500;
		
		  // Compute the new tree layout.
		  var nodes = tree.nodes(root).reverse();
		
		  // Normalize for fixed-depth.
		  nodes.forEach(function(d) { d.y = d.depth * 180; });
		
		  // Update the nodes�
		  var node = vis.selectAll("g.node")
		      .data(nodes, function(d) { return d.id || (d.id = ++i); });
		
		  // Enter any new nodes at the parent's previous position.
		  var nodeEnter = node.enter().append("svg:g")
		      .attr("class", "node")
		      .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
		      .on("click", function(d) { toggle(d); update(d); });
		
		  nodeEnter.append("svg:circle")
		      .attr("r", 1e-6)
		      .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
		
		  nodeEnter.append("svg:text")
		      .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
		      .attr("dy", ".35em")
		      .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
		      .text(function(d) { return d.name; })
		      .style("fill-opacity", 1e-6);
		
		  // Transition nodes to their new position.
		  var nodeUpdate = node.transition()
		      .duration(duration)
		      .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });
		
		  nodeUpdate.select("circle")
		      .attr("r", 4.5)
		      .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
		
		  nodeUpdate.select("text")
		      .style("fill-opacity", 1);
		
		  // Transition exiting nodes to the parent's new position.
		  var nodeExit = node.exit().transition()
		      .duration(duration)
		      .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
		      .remove();
		
		  nodeExit.select("circle")
		      .attr("r", 1e-6);
		
		  nodeExit.select("text")
		      .style("fill-opacity", 1e-6);
		
		  // Update the links
		  var link = vis.selectAll("path.link")
		      .data(tree.links(nodes), function(d) { return d.target.id; });
		
		  // Enter any new links at the parent's previous position.
		  link.enter().insert("svg:path", "g")
		      .attr("class", "link")
		      .attr("d", function(d) {
		        var o = {x: source.x0, y: source.y0};
		        return diagonal({source: o, target: o});
		      })
		    .transition()
		      .duration(duration)
		      .attr("d", diagonal);
		
		  // Transition links to their new position.
		  link.transition()
		      .duration(duration)
		      .attr("d", diagonal);
		
		  // Transition exiting nodes to the parent's new position.
		  link.exit().transition()
		      .duration(duration)
		      .attr("d", function(d) {
		        var o = {x: source.x, y: source.y};
		        return diagonal({source: o, target: o});
		      })
		      .remove();
		
		  // Stash the old positions for transition.
		  s.forEach(function(d) {
		    d.x0 = d.x;
		    d.y0 = d.y;
		  });
		}
		
		// Toggle children.
		function toggle(d) {
		  if (d.children) {
		    d._children = d.children;
		    d.children = null;
		  } else {
		    d.children = d._children;
		    d._children = null;
		  }
		}